I have mysql table like this :

created with spring jpa

@Where(clause = "active =1") @Entity @Table(name = "category", catalog = "businessin") public class Category implements java.io.Serializable {       @Id     @GeneratedValue(strategy = IDENTITY)     @Column(name = "id", unique = true, nullable = false)     private Integer id;     private String name;     private Integer parentId;     private Integer active;     private String pic;     @JsonIgnore     @OneToMany(fetch = FetchType.LAZY, mappedBy = "category")     private List<Product> products = new ArrayList<Product>();     //setters and getters } 

I’m building a RESTful API using spring REST & spring data (JpaRespositories) with spring-boot

when print main Categories(Electronics & Clothes) as JSON response from the controller i want them to have also a list of their sub Categories.

from this

[ { id: 1, name: "Electronics", parentId: 0, active: 1, pic: null } ] 

to this

[ { id: 1, name: "Electronics", parentId: 0, active: 1, pic: null, subCategories: [Mobiles, Laptops] } ] 

How can i do this?